Automatic circuit breaking switch



Patented Aug. 9, 1932 UNITED STATES ALBERT O. DANNEB, 0F INDIANAPOLIS,INDIANA, ASSIGNOR OF ONE-HALF T0 ROBERT J. ROCKER, 0F INDIANAPOLIS,INDIANA AUTOMATIC CIRCUIT BREAKING SWITCH Application filed September18, 1929. Serial No, 898,553.

This invention relates to automatic switches, and a feature of theinvention is the provision of means for instantly cutting out the switchupon the operation of certain rotar parts.

Ot er features and advantages Wlll be hereinafter more fully set forthand pointed out in the accompany specification.

In the accompanying drawing which is made a part of this application.

Figure 1 is an enlarged detail sectional view thru the automatic circuitgovernor.

Figure 2 is a sectional view thereof as seen along line 2-2, Fig. 1.

Referring to the drawing in which similar reference numerals designatecorresponding parts thruout the several views, the numeral 23 designatesa governor comprising a circular contact ring which is mounted within ahousing 26 and insulated therefrom, the cable 24 being connected withsaid contact ring. Cooperating with the contact ring 25 are contactbrushes 27 and 28, which are attached to the ends of arms 29 and 30,respectively, said arms being in turn pivotally mounted to a yoke 31carried by and fixed to a shaft 32, extending thru thehousing 26 andconcentrically with the ring 25. The brushes 27 and 28 are moved intocontact with the ring 25 thru the medium of a spring 33 which has itsends connected with the arms 29 and 30 on that side of the yoke 31opposite the brush members 27 and 28, the tension of said spring beingsuch as to hold the brushes 27 and 28 in more or less firm engagementwith the ring 25.

In order to automatically release the brushcs 27 and 28 from the ring 25and thus break the electric circuit when the shaft 32 is rotated,counter weights or balls 36 and 37 are provided on the arms 29 and 30,on the ends opposite the brushes 27 and 28, and the centrifugal forceincident to the rapid rotation of the shaft 32 and arms connectedtherewith will overcome the tension of the spring 33,

and the contact brushes 27 and 28 are automatically and substantiallyinstantly moved out of engagement with the ring 25 and will be held inthis position so long as the shaft 32 i running.

The governor 23 in this instance is shown attached to a bracket 39 andthru which the governor is grounded, but it will be understood that ifpreferred, the governor may be mounted otherwise.

It will likewise be seen that this devicewill be positive in itsoperation, and can be cheaply manufactured as well as readily installed,and by very minor changes may be applied to many uses.

While I have illustrated in a general way, certain instrumentalitieswhich may be employed in carrying my invention into effect, it isevident that many modifications may be made in the various detailswithout departing from the scope of the appended claims, it beingunderstood that my invention is not restricted to the particularexamples herein described.

I claim as my invention:

1. A means for making and breaking a circuit comprising a singlestationary circuit contact ring having an interior brush surface,contact brushes within said ring serving to make frictional andelectrical contact therewith, arms, one end of each serving to carry oneof said brushes, weights at the opposite ends of said arms, rotatablepivot means serving to pivot said arms between said brushes and the saidWeights, and yielding means for drawing the weight carrying ends of saidarms inwardly for contacting the brushes with said ring; whereby thefrictional and electrical contact of said brush and ring will be brokenwhen said pivot means is rotated by the centrifugal action of saidweights on said arms.

2. A. circuit breaking means comprising a shaft, a yoke attached theretoand adapted to rotate therewith, arms on opposite sides of said shaftand pivoted between their ends to said yoke, a brush at one end of eacharm, a single stationary ring 'within which said brushes contact toclose a circuit, weights at 5 the opposite ends of said arms ada ted toswing outwardly and disen age the rushes from the ring when the sha t isrotated, and spring means for drawing the weighted ends of said armsinwardly and re-establish con- 1 tact between said brushes and ring,when rotation of said shaft is stopped.

In testimony whereof, I have hereunto set fiylgiand on this the 27th dayof August, 1929,

15 ALBERT C. DANNER.

